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North Magnetic Pole Shifts, which triggers the navigation update



The rapid and irreproachable movement of the northern magnetic pole requires the early release of a new earth magnetic field model for military and civilian navigation around the Arctic. The partial suspension of the federal government will postpone the issuance of this model from 15 January to at least 30 January, despite the request of the US military to update it before the scheduled deadline.

Nobody is quite sure why the change has accelerated and why the field has recently increased Nature.

The previous model of the magnetic field was released in 2015, and the updates were scheduled for 5-year intervals. However, these changes are sufficiently extensive for military and civilian navigation – particularly in the Arctic Ocean – that the latest revision should have occurred in 2019. The increase in 2016 took place only after the last model was determined, which made the update critical for four years.

This update does not affect GPS receivers that do not rely on the magnetic north pole. The receiver instead collects signals from several satellites for which the precise position of the orbit is known, and uses trilateration (the intersection of their signals) to determine the location. However, satellite orbits are optimized for reception in the most populated parts of the world, while other factors reduce the accuracy of GPS and reception in the Arctic.

The magnetic north pole was never a fixed point, but the north tip against which the compass magnets show by its nature has accelerated its movement over the past 40 years from the movements recorded in the first decades. (The geographical north pole and the magnetic north pole have no special relationship: the first is determined by cartographers.)

First measured in 1831 in the Canadian Arctic, the pole began slowly to the north. Until the 1990s, the change accelerated from about 10 miles per year to 30 miles per year. This led to a total movement of 600 miles in 150 years. Now it's in the Arctic Ocean and goes to Siberia.

Earth's fluid core contributes most to the magnetic field of the planet. The field is changing all over the world, as well as the "top" that indicates the north pole.


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